Aliexpress
There’re some similar items on Aliexpress in my database. There may be some other items though.
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
SpeedyBee F405 Mini BLS 35A 20x20mm Flight Controller | 39.35 USD | – |
 |
SpeedyBee F405 WING APP ArduPilot INAV 2-6S Flight Controller | 42.19 USD | – |
 |
SpeedyBee Adapter 3 RunCam RC Blackbox Analyzer Configurator | 44.27 USD | – |
 |
SpeedyBee F405 WING APP Fixed Wing Flight Controller | 47.75 USD | – |
 |
SpeedyBee F405 V3 BLS 50A 30×30 FC and ESC Stack | 63.86 USD | – |
 |
SpeedyBee F405 V3 BLS 50A 30×30 FC and ESC Stack | 63.95 USD | – |
 |
SpeedyBee F405 V3 BLS 50A 30×30 FC and ESC Stack | 64.02 USD | – |
 |
SpeedyBee F405 Mini BLS 35A 20x20mm Flight Controller | 71.00 USD | – |
 |
SpeedyBee F405 V3 BLS 50A 30×30 FC and ESC Stack | 76.20 USD | – |
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (36.12 USD): BGJON8
Coupon (36.12 USD): BGRCParts8
Coupon (36.12 USD): tRaDetRaCKeR
Coupon (36.12 USD): 8wEbgaInS5
Coupon (36.12 USD): pROMo8cuPoN
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGANBEE2, BGSPEEDYBEE2, BGAFF10OFF, BGCuponation10, BGDAVIS, BGHONEY2110, Parts8, BG1efeb0, MVC8SPRING, 8BGwbg2204
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Speedy Bee Adapter 2 Micro USB RC 1-6S.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).